ok
Mini Shell
<?php
$orig_srcpath = '../tests/tiger.png'; // as specified in your file (could be full URL)
$file = 'http://127.0.0.1/MPDF1.com/common/mpdf/tests/tiger.png'; // Full URL
$fileIsLocal = true; // is the file in the same domain?
//======================================================================
$ppUx = 0;
$type = '';
$data = '';
echo 'File: ' . $orig_srcpath . '<br />';
echo 'Full File URL: ' . $file . '<br />';
if ($orig_srcpath && $fileIsLocal && $check = @fopen($orig_srcpath, "rb")) {
fclose($check);
$file = $orig_srcpath;
$data = file_get_contents($file);
$type = _imageTypeFromString($data);
echo 'File accessed using fopen on $orig_srcpath' . '<br />';
}
if (!$data && $check = @fopen($file, "rb")) {
fclose($check);
$data = file_get_contents($file);
$type = _imageTypeFromString($data);
echo 'File accessed using fopen on $file' . '<br />';
}
if ((!$data || !$type) && !ini_get('allow_url_fopen')) { // only worth trying if remote file and !ini_get('allow_url_fopen')
file_get_contents_by_socket($file, $data); // needs full url?? even on local (never needed for local)
if ($data) {
$type = _imageTypeFromString($data);
}
echo 'File accessed using socket ' . '<br />';
}
if ((!$data || !$type) && !ini_get('allow_url_fopen') && function_exists("curl_init")) {
file_get_contents_by_curl($file, $data); // needs full url?? even on local (never needed for local)
if ($data) {
$type = _imageTypeFromString($data);
}
echo 'File accessed using cURL ' . '<br />';
}
if (!$data) {
echo 'Could not access image file' . '<br />';
exit;
}
echo 'Image type determined: ' . strtoupper($type) . '<br />';
// JPEG
if ($type == 'jpeg' || $type == 'jpg') {
$hdr = _jpgHeaderFromString($data);
if (!$hdr) {
echo 'Error parsing JPG header' . '<br />';
exit;
}
$a = _jpgDataFromHeader($hdr);
$channels = intval($a[4]);
echo 'Width: ' . $a[0] . '<br />';
echo 'Height: ' . $a[1] . '<br />';
echo 'Colorspace: ' . $a[2] . '<br />';
echo 'BPC (bits per channel): ' . $a[3] . '<br />';
echo 'Channels: ' . $channels . '<br />';
$j = strpos($data, 'JFIF');
if ($j) {
//Read resolution
$unitSp = ord(substr($data, ($j + 7), 1));
if ($unitSp > 0) {
$ppUx = _twobytes2int(substr($data, ($j + 8), 2)); // horizontal pixels per meter, usually set to zero
if ($unitSp == 2) { // = dots per cm (if == 1 set as dpi)
$ppUx = round($ppUx / 10 * 25.4);
}
}
echo 'Resolution ppUx: ' . $ppUx . '<br />';
} else
echo 'JFIF not found in header' . '<br />';
// mPDF 6 ICC profile
$offset = 0;
$icc = array();
while (($pos = strpos($data, "ICC_PROFILE\0", $offset)) !== false) {
// get ICC sequence length
$length = _twobytes2int(substr($data, ($pos - 2), 2)) - 16;
$sn = max(1, ord($data[($pos + 12)]));
$nom = max(1, ord($data[($pos + 13)]));
$icc[($sn - 1)] = substr($data, ($pos + 14), $length);
$offset = ($pos + 14 + $length);
}
// order and compact ICC segments
if (count($icc) > 0) {
echo 'ICC profile present' . '<br />';
ksort($icc);
$icc = implode('', $icc);
if (substr($icc, 36, 4) != 'acsp') {
// invalid ICC profile
echo 'ICC profile INVALID (no acsp flag)' . '<br />';
}
$input = substr($icc, 16, 4);
$output = substr($icc, 20, 4);
echo 'ICC profile Input: ' . $input . '<br />';
echo 'ICC profile Output: ' . $output . '<br />';
// Ignore Color profiles for conversion to other colorspaces e.g. CMYK/Lab
if ($input != 'RGB ' || $output != 'XYZ ') {
echo 'ICC profile ignored by mPDF' . '<br />';
}
}
}
// PNG
else if ($type == 'png') {
//Check signature
if (substr($data, 0, 8) != chr(137) . 'PNG' . chr(13) . chr(10) . chr(26) . chr(10)) {
echo 'Error parsing PNG identifier<br />';
exit;
}
//Read header chunk
if (substr($data, 12, 4) != 'IHDR') {
echo 'Incorrect PNG file (no IHDR block found)<br />';
exit;
}
$w = _fourbytes2int(substr($data, 16, 4));
$h = _fourbytes2int(substr($data, 20, 4));
$bpc = ord(substr($data, 24, 1));
$errpng = false;
$pngalpha = false;
$channels = 0;
echo 'Width: ' . $w . '<br />';
echo 'Height: ' . $h . '<br />';
echo 'BPC (bits per channel): ' . $bpc . '<br />';
$ct = ord(substr($data, 25, 1));
if ($ct == 0) {
$colspace = 'DeviceGray';
$channels = 1;
} elseif ($ct == 2) {
$colspace = 'DeviceRGB';
$channels = 3;
} elseif ($ct == 3) {
$colspace = 'Indexed';
$channels = 1;
} elseif ($ct == 4) {
$colspace = 'DeviceGray';
$channels = 1;
$errpng = 'alpha channel';
$pngalpha = true;
} else {
$colspace = 'DeviceRGB';
$channels = 3;
$errpng = 'alpha channel';
$pngalpha = true;
}
echo 'Colorspace: ' . $colspace . '<br />';
echo 'Channels: ' . $channels . '<br />';
if ($pngalpha)
echo 'Alpha channel detected' . '<br />';
if ($ct < 4 && strpos($data, 'tRNS') !== false) {
echo 'Transparency detected' . '<br />';
$errpng = 'transparency';
$pngalpha = true;
}
if ($ct == 3 && strpos($data, 'iCCP') !== false) {
echo 'Indexed plus ICC' . '<br />';
$errpng = 'indexed plus ICC';
}
if (ord(substr($data, 26, 1)) != 0) {
echo 'compression method not set to zero<br />';
$errpng = 'compression method';
} // only 0 should be specified
if (ord(substr($data, 27, 1)) != 0) {
echo 'filter method not set to zero<br />';
$errpng = 'filter method';
} // only 0 should be specified
if (ord(substr($data, 28, 1)) != 0) {
echo 'interlaced file not set to zero<br />';
$errpng = 'interlaced file';
}
$j = strpos($data, 'pHYs');
if ($j) {
//Read resolution
$unitSp = ord(substr($data, ($j + 12), 1));
if ($unitSp == 1) {
$ppUx = _fourbytes2int(substr($data, ($j + 4), 4)); // horizontal pixels per meter, usually set to zero
$ppUx = round($ppUx / 1000 * 25.4);
}
echo 'Resolution ppUx: ' . $ppUx . '<br />';
}
// mPDF 6 Gamma correction
$gamma_correction = 0;
$gAMA = 0;
$j = strpos($data, 'gAMA');
if ($j && strpos($data, 'sRGB') === false) { // sRGB colorspace - overrides gAMA
$gAMA = _fourbytes2int(substr($data, ($j + 4), 4)); // Gamma value times 100000
$gAMA /= 100000;
}
if ($gAMA) {
$gamma_correction = 1 / $gAMA;
}
// Don't need to apply gamma correction if == default i.e. 2.2
if ($gamma_correction > 2.15 && $gamma_correction < 2.25) {
$gamma_correction = 0;
}
if ($gamma_correction) {
echo 'Gamma correction detected' . '<br />';
}
// NOT supported at present
if (strpos($data, 'sRGB') !== false)
echo 'sRGB colorspace - NOT supported at present' . '<br />';
if (strpos($data, 'cHRM') !== false)
echo 'Chromaticity and Whitepoint - NOT supported at present' . '<br />';
if (($errpng || $pngalpha || $gamma_correction)) {
if (function_exists('gd_info')) {
$gd = gd_info();
} else {
$gd = array();
}
if (!isset($gd['PNG Support'])) {
echo 'GD library required for PNG image (' . $errpng . ')' . '<br />';
}
$im = imagecreatefromstring($data);
if (!$im) {
echo 'Error creating GD image from PNG file (' . $errpng . ')' . '<br />';
}
$w = imagesx($im);
$h = imagesy($im);
if ($im) {
// Alpha channel set (including using tRNS for Paletted images)
if ($pngalpha) {
echo 'Alpha channel will be used by mPDF (including when tRNS present in Paletted images)<br />';
if ($colspace == 'Indexed') {
echo '...Generating Alpha channel values from tRNS (Indexed)<br />';
} else if ($ct === 0 || $ct == 2) {
echo '...Generating Alpha channel values from tRNS (non-Indexed)<br />';
} else {
echo '...Extracting Alpha channel<br />';
}
} else { // No alpha/transparency set (but cannot read directly because e.g. bit-depth != 8, interlaced etc)
echo 'No alpha/transparency set (but cannot read directly because e.g. bit-depth != 8, interlaced etc)<br />';
// ICC profile
$icc = false;
$p = strpos($data, 'iCCP');
if ($p && $colspace == "Indexed") {
$p += 4;
$n = _fourbytes2int(substr($data, ($p - 8), 4));
$nullsep = strpos(substr($data, $p, 80), chr(0));
$icc = substr($data, ($p + $nullsep + 2), ($n - ($nullsep + 2)));
// Test if file is gzcompressed
if (ord(substr($str, 0, 1)) == 0x1f && ord(substr($str, 1, 1)) == 0x8b) {
$icc = @gzuncompress($icc); // Ignored if fails
}
if ($icc) {
echo 'ICC profile present' . '<br />';
if (substr($icc, 36, 4) != 'acsp') {
echo 'ICC profile INVALID (no acsp flag)' . '<br />';
$icc = false;
} // invalid ICC profile
else {
$input = substr($icc, 16, 4);
$output = substr($icc, 20, 4);
echo 'ICC profile Input: ' . $input . '<br />';
echo 'ICC profile Output: ' . $output . '<br />';
// Ignore Color profiles for conversion to other colorspaces e.g. CMYK/Lab
if ($input != 'RGB ' || $output != 'XYZ ') {
$icc = false;
echo 'ICC profile ignored by mPDF' . '<br />';
}
}
}
// Convert to RGB colorspace so can use ICC Profile
if ($icc) {
echo 'ICC profile and Indexed colorspace both present - need to Convert to RGB colorspace so can use ICC Profile<br />';
}
}
}
}
echo 'PNG Image parsed on second pass' . '<br />';
// SECOND PASS
imagealphablending($im, false);
imagesavealpha($im, false);
imageinterlace($im, false);
ob_start();
$check = @imagepng($im);
if (!$check) {
echo 'Error creating temporary image object whilst using GD library to parse PNG image' . '<br />';
}
$data = ob_get_contents();
ob_end_clean();
if (!$data) {
echo 'Error parsing temporary file image object created with GD library to parse PNG image' . '<br />';
}
imagedestroy($im);
//Check signature
if (substr($data, 0, 8) != chr(137) . 'PNG' . chr(13) . chr(10) . chr(26) . chr(10)) {
echo 'Error parsing PNG identifier<br />';
exit;
}
//Read header chunk
if (substr($data, 12, 4) != 'IHDR') {
echo 'Incorrect PNG file (no IHDR block found)<br />';
exit;
}
$w = _fourbytes2int(substr($data, 16, 4));
$h = _fourbytes2int(substr($data, 20, 4));
$bpc = ord(substr($data, 24, 1));
$errpng = false;
$pngalpha = false;
$channels = 0;
echo 'Width: ' . $w . '<br />';
echo 'Height: ' . $h . '<br />';
echo 'BPC (bits per channel): ' . $bpc . '<br />';
$ct = ord(substr($data, 25, 1));
if ($ct == 0) {
$colspace = 'DeviceGray';
$channels = 1;
} elseif ($ct == 2) {
$colspace = 'DeviceRGB';
$channels = 3;
} elseif ($ct == 3) {
$colspace = 'Indexed';
$channels = 1;
} elseif ($ct == 4) {
$colspace = 'DeviceGray';
$channels = 1;
$errpng = 'alpha channel';
$pngalpha = true;
} else {
$colspace = 'DeviceRGB';
$channels = 3;
$errpng = 'alpha channel';
$pngalpha = true;
}
echo 'Colorspace: ' . $colspace . '<br />';
echo 'Channels: ' . $channels . '<br />';
if ($pngalpha)
echo 'Alpha channel detected' . '<br />';
if ($ct < 4 && strpos($data, 'tRNS') !== false) {
echo 'Transparency detected' . '<br />';
$errpng = 'transparency';
$pngalpha = true;
}
if ($ct == 3 && strpos($data, 'iCCP') !== false) {
echo 'Indexed plus ICC' . '<br />';
$errpng = 'indexed plus ICC';
}
if (ord(substr($data, 26, 1)) != 0) {
echo 'compression method not set to zero<br />';
$errpng = 'compression method';
} // only 0 should be specified
if (ord(substr($data, 27, 1)) != 0) {
echo 'filter method not set to zero<br />';
$errpng = 'filter method';
} // only 0 should be specified
if (ord(substr($data, 28, 1)) != 0) {
echo 'interlaced file not set to zero<br />';
$errpng = 'interlaced file';
}
$j = strpos($data, 'pHYs');
if ($j) {
//Read resolution
$unitSp = ord(substr($data, ($j + 12), 1));
if ($unitSp == 1) {
$ppUx = _fourbytes2int(substr($data, ($j + 4), 4)); // horizontal pixels per meter, usually set to zero
$ppUx = round($ppUx / 1000 * 25.4);
}
echo 'Resolution ppUx: ' . $ppUx . '<br />';
}
//Gamma correction
$gamma_correction = 0;
$gAMA = 0;
$j = strpos($data, 'gAMA');
if ($j && strpos($data, 'sRGB') === false) { // sRGB colorspace - overrides gAMA
$gAMA = _fourbytes2int(substr($data, ($j + 4), 4)); // Gamma value times 100000
$gAMA /= 100000;
}
if ($gAMA) {
$gamma_correction = 1 / $gAMA;
}
// Don't need to apply gamma correction if == default i.e. 2.2
if ($gamma_correction > 2.15 && $gamma_correction < 2.25) {
$gamma_correction = 0;
}
if ($gamma_correction) {
echo 'Gamma correction detected' . '<br />';
}
// NOT supported at present
if (strpos($data, 'sRGB') !== false)
echo 'sRGB colorspace - NOT supported at present' . '<br />';
if (strpos($data, 'cHRM') !== false)
echo 'Chromaticity and Whitepoint - NOT supported at present' . '<br />';
}
else { // PNG image with no need to convert alpha channels, bpc <> 8 etc.
//Scan chunks looking for palette, transparency and image data
$pal = '';
$trns = '';
$pngdata = '';
$icc = false;
$p = 33;
do {
$n = _fourbytes2int(substr($data, $p, 4));
$p += 4;
$type = substr($data, $p, 4);
$p += 4;
if ($type == 'PLTE') {
//Read palette
$pal = substr($data, $p, $n);
$p += $n;
$p += 4;
} else if ($type == 'tRNS') {
//Read transparency info
$t = substr($data, $p, $n);
$p += $n;
if ($ct == 0)
$trns = array(ord(substr($t, 1, 1)));
else if ($ct == 2)
$trns = array(ord(substr($t, 1, 1)), ord(substr($t, 3, 1)), ord(substr($t, 5, 1)));
else {
$pos = strpos($t, chr(0));
if (is_int($pos))
$trns = array($pos);
}
$p += 4;
}
else if ($type == 'IDAT') {
$pngdata .= substr($data, $p, $n);
$p += $n;
$p += 4;
} else if ($type == 'iCCP') {
$nullsep = strpos(substr($data, $p, 80), chr(0));
$icc = substr($data, ($p + $nullsep + 2), ($n - ($nullsep + 2)));
// Test if file is gzcompressed
if (ord(substr($str, 0, 1)) == 0x1f && ord(substr($str, 1, 1)) == 0x8b) {
$icc = @gzuncompress($icc); // Ignored if fails
}
if ($icc) {
echo 'ICC profile present' . '<br />';
if (substr($icc, 36, 4) != 'acsp') {
echo 'ICC profile INVALID (no acsp flag)' . '<br />';
$icc = false;
} // invalid ICC profile
else {
$input = substr($icc, 16, 4);
$output = substr($icc, 20, 4);
echo 'ICC profile Input: ' . $input . '<br />';
echo 'ICC profile Output: ' . $output . '<br />';
// Ignore Color profiles for conversion to other colorspaces e.g. CMYK/Lab
if ($input != 'RGB ' || $output != 'XYZ ') {
$icc = false;
echo 'ICC profile ignored by mPDF' . '<br />';
}
}
}
$p += $n;
$p += 4;
} else if ($type == 'IEND') {
break;
} else if (preg_match('/[a-zA-Z]{4}/', $type)) {
$p += $n + 4;
} else {
echo 'Error parsing PNG image data<br />';
}
} while ($n);
if (!$pngdata) {
echo 'Error parsing PNG image data - no IDAT data found<br />';
}
if ($colspace == 'Indexed' && empty($pal)) {
echo 'Error parsing PNG image data - missing colour palette<br />';
}
echo 'PNG Image parsed directly' . '<br />';
}
}
// GIF
else if ($type == 'gif') {
}
// BMP (Windows Bitmap)
else if ($type == 'bmp') {
}
// WMF
else if ($type == 'wmf') {
}
// UNKNOWN TYPE - try GD imagecreatefromstring
else {
if (function_exists('gd_info')) {
$gd = gd_info();
} else {
$gd = array();
}
if (isset($gd['PNG Support']) && $gd['PNG Support']) {
$im = @imagecreatefromstring($data);
if ($im) {
echo 'Image type not recognised, but image created from file using GD imagecreate' . '<br />';
} else {
echo 'Error parsing image file - image type not recognised, and not supported by GD imagecreate' . '<br />';
}
}
}
exit;
//==============================================================
function _fourbytes2int($s) {
//Read a 4-byte integer from string
return (ord($s[0]) << 24) + (ord($s[1]) << 16) + (ord($s[2]) << 8) + ord($s[3]);
}
function _twobytes2int($s) { // equivalent to _get_ushort
//Read a 2-byte integer from string
return (ord(substr($s, 0, 1)) << 8) + ord(substr($s, 1, 1));
}
function _jpgHeaderFromString(&$data) {
$p = 4;
$p += _twobytes2int(substr($data, $p, 2)); // Length of initial marker block
$marker = substr($data, $p, 2);
while ($marker != chr(255) . chr(192) && $marker != chr(255) . chr(194) && $p < strlen($data)) {
// Start of frame marker (FFC0) or (FFC2) mPDF 4.4.004
$p += (_twobytes2int(substr($data, $p + 2, 2))) + 2; // Length of marker block
$marker = substr($data, $p, 2);
}
if ($marker != chr(255) . chr(192) && $marker != chr(255) . chr(194)) {
return false;
}
return substr($data, $p + 2, 10);
}
function _jpgDataFromHeader($hdr) {
$bpc = ord(substr($hdr, 2, 1));
if (!$bpc) {
$bpc = 8;
}
$h = _twobytes2int(substr($hdr, 3, 2));
$w = _twobytes2int(substr($hdr, 5, 2));
$channels = ord(substr($hdr, 7, 1));
if ($channels == 3) {
$colspace = 'DeviceRGB';
} elseif ($channels == 4) {
$colspace = 'DeviceCMYK';
} else {
$colspace = 'DeviceGray';
}
return array($w, $h, $colspace, $bpc, $channels);
}
function file_get_contents_by_curl($url, &$data) {
$timeout = 5;
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_NOBODY, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$data = curl_exec($ch);
curl_close($ch);
}
function file_get_contents_by_socket($url, &$data) {
// mPDF 5.7.3
$timeout = 1;
$p = parse_url($url);
$file = $p['path'];
if ($p['scheme'] == 'https') {
$prefix = 'ssl://';
$port = ($p['port'] ? $p['port'] : 443);
} else {
$prefix = '';
$port = ($p['port'] ? $p['port'] : 80);
}
if ($p['query']) {
$file .= '?' . $p['query'];
}
if (!($fh = @fsockopen($prefix . $p['host'], $port, $errno, $errstr, $timeout))) {
return false;
}
$getstring = "GET " . $file . " HTTP/1.0 \r\n" .
"Host: " . $p['host'] . " \r\n" .
"Connection: close\r\n\r\n";
fwrite($fh, $getstring);
// Get rid of HTTP header
$s = fgets($fh, 1024);
if (!$s) {
return false;
}
$httpheader .= $s;
while (!feof($fh)) {
$s = fgets($fh, 1024);
if ($s == "\r\n") {
break;
}
}
$data = '';
while (!feof($fh)) {
$data .= fgets($fh, 1024);
}
fclose($fh);
}
//==============================================================
function _imageTypeFromString(&$data) {
$type = '';
if (substr($data, 6, 4) == 'JFIF' || substr($data, 6, 4) == 'Exif' || substr($data, 0, 2) == chr(255) . chr(216)) { // 0xFF 0xD8
$type = 'jpeg';
} else if (substr($data, 0, 6) == "GIF87a" || substr($data, 0, 6) == "GIF89a") {
$type = 'gif';
} else if (substr($data, 0, 8) == chr(137) . 'PNG' . chr(13) . chr(10) . chr(26) . chr(10)) {
$type = 'png';
}
/* -- IMAGES-WMF -- */ else if (substr($data, 0, 4) == chr(215) . chr(205) . chr(198) . chr(154)) {
$type = 'wmf';
}
/* -- END IMAGES-WMF -- */ else if (preg_match('/<svg.*<\/svg>/is', $data)) {
$type = 'svg';
}
// BMP images
else if (substr($data, 0, 2) == "BM") {
$type = 'bmp';
}
return $type;
}
?>
Zerion Mini Shell 1.0